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(NqMoael.) D GROV 8 sheets- 4811888 1.

AIR HEATER.

PatentedJune 5, 1888;

3 Sheets-Sheet 2.

D. GROVE.

(No Model.)

A18 HEATER..

l l I llflllllllllll www l 3 sneetssneet s. D. GROVE.

' (No Mo'dei.)

AIE. HEATER.

Patented-Mine 5, 1888.

UNITED STATES 4PATENT OFFICE.

DAVID GROVE, OF BERLIN, GER-MANY.

AIR-H EATER.

Application led December 2l, 1885. Serial No. 186,383.

(No model.) Patented in Germany April 1S, 188:2, No. 20,730,

and in EnglandJanuary 4, 18553, No. 61.

,To all whom, it may concern:

Be it known that I, DAVID GROVE, of the city of Berlin, Prussia, Germany, have invented certain new and useful Improvements in Air-Heaters, (which have been partly patented to me in Germany under No. 20,780, dated April 18, 1882, and in England under No. 61, dated January 4., 1853,) of which the following is a specication.

My invention relates to apparatus for heating dwellings, hotels, and the like by means of hot air, thehcatbeing produced by the combastion of gas and air.

The present invention is to a certain extent an adaptation of the arrangement shown, de scribed, and claimed by me in a pending ap plicatiou, Serial No. 182,969, (which is for an improvement in waterheaters to air-heaters.

To this end my invention consists in an arrangement of heating-tubesinterposed between an inlet-pipe for the cold air and the lues leading to the rooms to be heated, the said heatingtubes being connected to each other, so as to form a continuous serpentine passage, the said tubes being arranged i n series alongside of each other, and with one row above thc other to any desired number. The lower ucs of the series are in connection with the chimney,

'while the serpentine passage at the opposite end connects with a combustioirchamber, in' which the combustion of the gas supplied from a suitablegenerator is caused by the introduction of heated air through a series of airducts, substantially as in the application above referred to, directly above the burner, the combustion taking place at this point, the heat and product-s of combustion passing from this point along the serpentine channel formed by the series of radiators and passing out through the chimney. In order to make the air moist and to prevent it from passing to the rooms to be heated in a hot dry state, I provide a Waterreceptacle within the chamber, which makes the air sufiicicntly moist. In order to allow the expansion and contraction of the radiatortubes, I provide them with projections and support them loosely in sand.

Figure l is a top view or plan of an airheating arrangement. Fig. 2 is a section of Fig. 1 on the line A B; Fig. 3, a section on the line C Din Fig. l. Fig. 4. represents the heating chamber of an air heating arrangement with my improved adjustable burner. Fig. 5 is a view of the one cheek or jaw of the burner, and Fig. 6 a vertical section of Fig. 5 on the line G H.

The gases produced in thcgencrator A, Fig. 1, pass through thepipe a into the flue or channel a. From here they pass through the narrow orifices of thc burner b into the combustion-chamber ai, where they come into contact With warmed atmospheric air. After the mixture of gas and air is ignited by means of a gasjet or a rag impregnated with petroleum -or any other suitable means, the burning gases stream through the cast-iron canals or dues a3 a* a5 in a serpentine direction from one pipe into the other, and then enterinto the chimney a9 through a suitable flue, as.

The air for the combustion is heated in the interior of the canals or chambers c c2 c3 c4 e5 and d d2' d d". This said atmospheric air passes through two openings, which can be closed, regulated, or altered in size, (and of which the one is in connection with the space c and the other in connection with the canal or flue d,) and continues in a serpentine direction through the air-heating canals orilues, which are lined with refractory material, until it passes out from the chambers c d* through several small orifices, Fig. 1, provided for the purpose, and serves to promote the combustion of the regenerative gas. The draft for this current of air is caused by the chimney or shaft. a, Fig. 3, is aspy-hole for the purpose of observing the flame, and by means of which air can be admitted above the burner or slot to the llame, which is done by suitably shifting the closingpiece al. Y The cast-iron canals or limes a3 c* a5 are provided with a large number of ribs, e, in order to present the greatest possible heating-sur-` IOO der the air in the air-chamber deleterious toV health, these upper canals or flues are lined with fire-proof clay or other suitable refractory material. A water-receptacle, h, is situated within the air-warming chamber g, the purpose of which is to supply the necessary amount of moisture to the warmed air before the same reaches the dwelling apartments through the conducting canals or flues t 'a'. This said water-receptacle h is kept supplied with water by another similar receptacle, K, which is situated outside theV airwarming chamber. This latter receptacle, K, is fed by a suitable water-pipe, K, which is in connection with the water-main. By means of the connection pipe or tube K2 the two vessels or receptaclesl act as communicating-pipes, so that the height ofthe water in the inner vessel, h, can be ascertained by means of the water glass or gage K3, arranged on the outcrreceptacle, K.

In order to avoid the necessity of putting the whole apparatus out of operation when repairs have to be carried out, a reserve fur nace, B, Fig. 1, is arranged, and in this ease the air-warming chamber g can be heated by direct firing.

The jaws Z1, Figs. 4, 5, and '6, consist of a fixed and a movable cheek or jaw, whereby the latter rests on small rollers p, which are provided with suitable collars, which run in appropriate grooves, p2, so that an accurate guiding of the burnerjaw or cheek is attained when the same is moved backward or forward.

The movement of the burner jaw or cheek is effected by means of the rod pf Having now particularly described and ascertained the nature of my invention and in what manner the same is to be performed, Ideelare that what I claim is- 1. In a hot-air heater, a series of radiators having passages connected for the products of combustion to pass through, and in connection with a suitable chimney, said lues being arranged within a heating-chamber, a combustion-chamber in connection with one of said iiues, a gas-supply for said combustion-chamber, and a burner therein, and air-duets for supplying air thereto, suitable inlet-pipes to V the heatingehamber for the cold air, and outlet-pipes therefrom to the apartments to be heated, combined with awater-receptacle con! tained in said chamber, substantially as described.

2. A hot-air heater having a combustionchamber supplied with fuel from a suitable source, a contracted opening forming a burner for the combustion of the fuel, and a series of airduets arranged upon either side of the combustioirchamber .for supplying air to promote combustion, the aireducts of each series being in connection with each other, to form circuitous passages, and one of said ducts of each series being in connection with the outside air, substantially as described.

3. In combination, the combustionchamber and the gasduct leading into the same, said chamber having a contracted opening serving as a burner formed by two jaws, one of which is adjustable to increase or diminish the size of the opening, substantially as described.

4. An air-heater having a heatingchamber with radiating-tubes therein, a co1nbustion chamber and a gassnpply duct and au airsupply duetto furnish gas and air to create combustion, and a contracted opening acting as a burner between the gas-supply duct and the combustion-chamber, said opening being formed by twojaws, one of which is adapted to slide,and is provided with rollers and operating-rods, substantially as described.

In witness whereof l have hereunto signed my namein the presence of two subscribing witnesses.

DAVID GROVE.

Witnesses:

B. Roi, M. IV. MOORE. 

